好了,那么我出几个题,不用正则,看我怎么解决的。
1.清除HTML中所有的标签,只保留超级链接。
我用strip_tags。
strip_tags($data,$tags)
$data为字符串,$tags为保留的标签。
strip_tags($data,'')即可。完了?对,就那么简单。
如果我还想保留,则strip_tags($data,'
')
2.截取$str中从$str1到$str2中间的字符串的第一个匹配。
function str_cut($str ,$start, $end) {//取出第一个匹配,效率最高
$content = strstr( $str, $start );
$content = substr( $content, strlen( $start ), strpos( $content, $end ) - strlen( $start ) );
return $content;
}
3.截取$str中从$str1到$str2中间的字符串的所有匹配。
function my_Ca($content,$start,$end){//取出所有匹配,不包含开始和结束字符串
$m = explode($start,$content);
$a = array();
$sum = count($m);
for( $i = 1;$i {
$my = explode($end,$m[$i]);
$a[] = $my[0];
unset($my);
}
return $a;
}
总结:你只要多想多总结,不用正则,用PHP自带的函数你能够解决大部分问题。

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